IgG immunoglobulins are comprised of 4 subclasses designated IgG1 through IgG4. IgG4-related disease has been recognized as a systemic disease entity characterized by an elevated serum IgG4 level, sclerosing fibrosis, and diffuse lympho-plasmacytic infiltration with the presence of many IgG4-positive plasma cells.

IgG immunoglobulins are comprised of 4 subclasses designated IgG1 through IgG4. IgG4-related disease has been recognized as a systemic disease entity characterized by an elevated serum IgG4 level, sclerosing fibrosis, and diffuse lympho-plasmacytic infiltration with the presence of many IgG4-positive plasma cells.

IgG immunoglobulins are comprised of 4 subclasses designated IgG1 through IgG4. IgG4-related disease has been recognized as a systemic disease entity characterized by an elevated serum IgG4 level, sclerosing fibrosis, and diffuse lympho-plasmacytic infiltration with the presence of many IgG4-positive plasma cells.

IgG immunoglobulins are comprised of 4 subclasses designated IgG1 through IgG4. IgG4-related disease has been recognized as a systemic disease entity characterized by an elevated serum IgG4 level, sclerosing fibrosis, and diffuse lympho-plasmacytic infiltration with the presence of many IgG4-positive plasma cells.